Saw-frame



2 Sheets-Sheet 1. F. W. OTIS. SAW FRAME (No Model.)

No. !348,453. Patented Oct. 22, 1895.

2 Sheets-Sheet 2.

(No Model.)

F. W. OTIS.

SAW FRAME.

No. 548,453. Patente Oct. 22, 1895.

M. PHUTDiNBEWAsHINGYDNJ C.

. Ummah STATES AThNt Qrrma FREDERICK l/V. OTIS, OF ORAN GE, CONNECTICUT.

SAW- FRAM E.

SPECIFICATION forming part of Letters Patent No. 548,453, dated October 22, 1895.

Application filed December 17,1894I Renewed August 10, 1895. Serial Ne. 5582 o model- To zZZ whom it may concern:

Be it known that I, FREDERICK W. OTIS, of Orange, in the county of New Haven and State of Connecticut, have invented a new Improvement in Saw-Frames; and I do herebydeclare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specifioation, and represent, in-- Figure 1, a side View of the saw complete; Fig. 2, a top View of the same; Fig. 3, a section on line c cl of Fig. 1; Fig. 4, a section on line efof Fig. 1, looking forward; Fig. 5, a section on line a b of Fig. 1. Fig. 6 illustrates a modification of the connection between the handle and the saw-frame; Fig. 7, a section on line g h of Fig. 1; Figs. 8 and 9, mcdifications in the construction of the vise; Fig. lO, an enlarged broken view illustrating the means of attachingthe saw to the forward end of the frame; Fig. 11, a section on line wa: of Fig. 10; Fig. 12, an enlarged broken View illustrating the manner of securing the saw to the rear end of the frame.

This invention relates to an improvement in saw-frames, and particularly to that class which are arranged to operate hack-saws for sawing metal, the object of the invention being to produce a simple device which maybe secure-d to a bench or which may be applied directly to the rod or article to be sawed-as, for instance, a shafting from which it is desired to cut a piece without removing the shaft from the hangers; and the invention consists in certain details of construction and combinations of paris, as will be hereinafter described, and particularly recited in the claims.

A is the bed, which is formed on one side with upwardly-extending postsB C, between which are longituclinal window guide-rods D D, parallel with each other and with the bed A. On the guide-rods D D a slide E is arranged for transverse movementthereon. The saw-frame consists of a, bow F, between the ends of which the saw-blade G is Secured, the rear end of the frame extending rearwardly and connected to the slide E upon a pivot a. The rear end of the frame is also forned with an upwardly-extending arm H, around which a lever K, the lower end of which is secured to the lower rear end of the bed A. At the forward end of the bed is a fixed jaw L, and guided in the frame on ways Iv M', extending upward from the sides of the lied A, is a movable jaw M, which has a depending shank N through which an Operating-screw O passes, and whereby said jaw M is moved toward or from the stationary jaw L in substantially the same manner as an ordinary vise. Secured to the post C is a saw-guide P, which consists of a rod, the outer end of which is bifurcated to set over the back of the sawblade G, as shown in Fig. 3. Upon the top of the frame F and adjustablysccured thereto is a weight Q.

The saw-blade G ma3 be Secured in the frame in any desired manner; but preferably the forward end of the frame has a transverse perforation d, and on the inner face of the forward end of the frame is a slot e, opening into said perforation. In the said slot e is a studf, from which a screw g extends outward through the perforation d and receives at its outer end a thumbnut h, and so that. by turning said nut the stud f is moved back and forth through the slot e. The saws are provided at each end with openings, one of which is set over the stud f and the other over a stud 'L', fixed to the rear of the frame at the inner edge. When the saw is so placed over the studs, they may be held by latchesj 75, which are pivoted to the frame above the studs and so as to Swing down over the upper edge of the saw, and preferably the latch at the rear is formed with a notch l, which will engage with a stud 'i and thus securely lock the saw thereon'. When the saw is thus engaged with the studs, the thumb-nut h is turned to draw the stud foutward, thus giving the saw the proper tension.

In operation the work is clamped between the jaws L M, the saW-blade resting thereupon and under the pressure of the weight Q. The lever K, being moved backward or forward, moves the saw-frame F through the connecting-link J, said frame being guided on the rods D D, the Saw-guide P 'sending to prevent lateral play of the saw. When the desired amount of cutting is attained, the lever may be depressed, as shown in broken lines, Fig. 1, which brings the slide E against the post B, and the continued downward movement of the lever then raises the forward end of the saw-frame Upward, as also shown in broken lines, Fig. l. As the saw is raised the guide P drops rearward against the forward upper end of the slide E. When it is again desired to use the saw, the lever is raised, which first lowers the frame against the work held by the jaws of the Vise. The continued forward movement of the lever moves the slide, and consequently the frame of the saw, forward and at the same time raises the guide P until it drops forward and over the back of the saw, as before described, in which position the saw is ready for operation;

Instead of forming the rear end of the sawframe with the post H, the link J might be connected to the rear end of the frame, as shown in Fig. 6; but the first-described construction is preferable, as the adjustment of the connection between the link and the lever permits a greater or less amount of pressure to be brought upon the saw, accordingly as the connection between the link and the frame is raised or lowered.

Instead of forming the movable jaw in rear of the stationary jaw, this arrangement might be reversed, as seen in Fig. 8, in which the forward jaw is movable and the rear jaw formed integral with the bed; or, instead of forming the stationary jaw integral with the bed, it might be adjustably Secured thereto, as shown in Fig. 9, and the other jaw made movable with relation thereto 'and so that both jaws might be turned to present their work at an angle to the saw in case it were desired to make a bevel cut.

It will be seen that the work may be readily clamped between the jaws and rigidly held with relation to the movement of the sawblade, and in case it is desired to cut shafting already hung the jaws can be secured to the shaft and the saw operated without inconvcnience.

I am aware that saw-frames have been mounted for operation by a lever, and therefore do not wish to be understood as claiming, broadly, such as my invention; but,

Having fully described my invention, what I claim is- 1. The herein described hack saw-f'ame consisting of a base, horizontal guide-rods mounted thereon, a slide on said rods, a sawframe pivotally connected at its rear end with said slide, a lever pivotally secured to said base, and a link connecting said saw-frame and lever, substantially as described.

2. The herein described hack saw-iframe consisting of a base, horizontal guide-rods mounted thereon, a slide on said rods, a sawframe pivotally connected at its rear end with said slide, a lever pivotally Secured to said base, a link connecting said saw-frame and lever, and clamping jaws arranged at theforward end of said base, substantially as described.

3. The herein described hack saw-frane consisting of a base, horizontal guide-rods mounted thei-een, a slide on said rods,a sawframe pivotally connected at'its rear end with said slide, a blade Secured by its ends to said frame, a lever pivotally secured to said base, a link connecting said saw-frame and lever, and a saw-guide monnted on the said base forward of said slide, and whereby said slide may operate to turn the guide from the retired to the Operating position, substantially as described.

i. The herein described hack saw-treme, consisting of a base, horizontal guide-rods mounted thereon, a slide on said rods, a sawframe pivotally connected at its rearend wit h said slide, a lever pivotally Secured to said base, a link connecting said saw-frame and lever, and a weight adjustably secured to the back of said saw-frame, substantially as described.

5. The herein described hack saw-frame consisting of a base, horizontal guide-rods mounted thereon, a slide on said rods, a sawframe pivotally connected at its rear end with said slide, an upward projection from the rear end of said saw-frame, a lever pivotally Secured to said base, and a link connecting said lever and the projection from said sawframe, substantially as described.

6. In a hack saw-t'rame, the saw-frame, the lower end of which is slotted, a stud mounted in the said slot and adapted to be moved therein, and with which one end of the saw blade is connected, the rear end of said frame formed with a stud with which the rear end of the saw blade is engaged, and latches mounted on said frame,and adapted to swing over said blade, whereby it is held in engagement with said studs substautially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

FRED. \V. OTIS.

Witnesscs:

FRED O. EARLE, LILLIAN D. KELSEY.

TOO

IIO 

